# -*- coding: utf-8 -*-
# author: AZJ
# date: 2024/11/7
# 假如命运扼住了你的咽喉，你就去挠她的咯吱窝

class Calc(object):
    def add(self,a,b):
        return a + b
    def sub(self,a,b):
        return a - b
    def mul(self,a,b):
        return a * b
    def div(self,a,b):
        return a / b